MODIFIED POLYETHYLENE POLYAMINE AND EPOXY RESIN SCHUNGITE FOR THE EXTRACTION OF LEAD IONS FROM WASTEWATER

Abstract

The development of effective and inexpensive sorbents of a wide profile is an urgent problem. In this regard, it is necessary to use new modified ion exchangers used for wastewater treatment and control over the content of various substances in the environment. To increase sorption characteristics, modification is performed. Modification of sorbents with improved sorption and kinetic characteristics has great prospects, such as highly permeable cross-linked polyelectrolytes, with a high absorption rate of large ions, valuable physicochemical properties, cheap natural minerals modified with polyethylene polyamine and epoxy resins in order to obtain reactive copolymers with epoxy groups, capable of participating in curing reactions in the presence of acid compounds and basic s. New sorbents based on Koksu natural shungite modified with polyethylene polyamine and epoxy resin have been developed for sorption of lead ions. The equilibrium and kinetic parameters of sorption are calculated, the optimal conditions for water purification under static conditions are determined. The sorption properties of natural schungite and its modified polyethylene polyamine (PEPA) and epoxy resin (ED-20) forms with respect to the Pb2+ ion on the pH of the medium, on the contact time and the concentration of the solution are determined. Sorption capacity under static conditions is 0.45 mg/g of sorbent. The research is due to the need for wastewater treatment of metallurgical enterprises from Pb2+ ions. Lead compounds are harmful substances that exhibit mutagenic, carcinogenic properties. Modified natural shungite can be used as a sorption material for the treatment of industrial and waste water.

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